Fan housing construction



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W. H. DE LANCEY FAN HOUSING CONSTRUCTION 3 Sheets-Sheet 3 Original Filed Jan. 20, 1945 Patented Dec. 21, 1948 FAN HOUSING CONSTRUCTION Warren H. De Lancey, Springfield, Mass., assigner to Gilbert & Barker Manufacturing Company,

West Massachusetts Springfield, Mass.,

a corporation of Original application January 20, 1945, Serial No. 573,697. Divided and this application July 8, 1946, Serial No. 681,846

1 Claim. l

This invention relates to improvements in oil burners and is a division of my copending United States patent application Serial No. 573,697, filed January 20, 1945.

The invention has for an object to provide in an oil burner an improved housing construction, which is made up of a plurality of sections and which has within it a scroll chamber for the airsupply fan, a plenum chamber encompassing the air tube and communicating therewith through an air director, and a passage interconnecting the fan and plenum chambers.

The invention will be disclosed with reference to the accompanying drawings, in which;

Fig. 1 is a sectional elevational view of an oil burner embodying the invention;

Fig. 2 is an end elevational view thereof;

Fig. 3 is a cross sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a sectional plan view taken on the line 4-4 of Fig. 3; and

Fig. 5 is a fragmentary sectional plan view taken on the line 5-5 of Fig. 2.

Referring to these drawings, a hollow frame (Fig. 1) is made up of two end members I and inner flange 9. This inner flange provides a Scroll 1'...

chamber I0, a plenum chamber II and a connecting passage I2 between these chambers. The end member I' has a flat wall I3, which forms the front wall of the housing, an outer marginal flange I4 and an inner flange I5. The intermediate section 3 consists of a thin metal plate and the intermediae section 4 consists of a sheet of sound deadening material of the same size and shape as the plate. These sections 3 and 4 form an end wall for the scroll chamber, which wall has an air inlet I6 to such chamber. The sections 3 and 4 also form an end wall for the passage I2. These intermediate sections (Figs. 3 and 4) have an opening Il therethrough of about the cross sectional size and shape of the plenum chamber II. The sections 3 and 4 are clamped between the flange I5 and that part of the iiange 9, which .bounds the plenum chamber, as shown in Figs. 1 and 4. The sections 3 and 4 are further clamped between the upper qll.

2 portions of the outer marginal flanges and it, as shown in Fig. l.. The two end members I and 2 with the intervening parts 3 and d are held together by a plurality of screws I8, located as indicated in Fig. 3, and each passing through the front wall I'3 and threading into the flange 3 of the back wall 2. These screws may also pass through hubs, such as I9, which project from the front wall I3, as shown in Fig. 4, and abut plates 3 and ll. The construction thus affords two mating half sections I and 2 with marginal flanges 8 and Il! which abut and form the top and side walls of the housing.

The back wall 'I of the housing (Fig. l) has an opening 23 therein through which the air-supplying fan 2| may be inserted in the scroll chamber Iii. This opening is closed by the mounting flange 22 of an electric motor 23 on the shaft 24 of which the ian 2| is fixed, such flange being fixed by screws 25 (Fig. 2) to Wall l. The front wall I3 (Fig. 1) has louvers 26 therein, which allow air to enter a chamber 2l, between wall I3 and plate 3, and thence through open ing I6 to the scroll chamber Il). Air is delivered by the fan 2l through passage l2 tangentially into the plenum chamber II.

The back wall l' has a tubular projection 2B (Figs. 1 and 4) which extends through the plenum chamber II and has its forward end engaging a gasket 29 and the latter engaging wall i3. Through the forward portion of the periphery of extension 28 are a plurality of slots 30, through which air from the plenum chamber `Il may be forced into the interior of extension 28, which forms the rear end of the air tube of the burner. A cylindrical metal tube 3l is xed at one end to the front wall I3 and is in communication with, and in extension of, the member 28 and forms the forward part of the air tube. The rear end of the air tube is closed by a door 32 (Figs. 1 and 4) of thin plate, hinged at 33 (Figs. 2 and 4) to back wall 'i and held in closed position by screws 34! (Fig. 2).

A valve, in the form of a sleeve 35 (Figs. 1 and 4), is mounted on the rearward portion of the extension 28 for longitudinal sliding movement and is adapted to regulate the volume of air supplied through slots 30 to the air tube. This valve is movable by a screw 35, rotatably mounted at its ends as shown in Fig. 5 in the front and back walls 'I and I3, respectively, but held against axial movement as indicated. Screw 36 has a slotted outer end 3l (Figs. 2 and 5) which is accessible through a hole in door 3.2 and which is adapted to receive and be turned by a screw driver. On screw 36 is a nut 31' which has a part engaged between two ears 38 on sleeve valve 35 and pivotally connected at 39 to such ears. By turning screw 36 the valve 35 may be moved longitudinally to carry the valve along tubular extension 28 to vary the air ow through slots 30.

Located in the air tube is an oil atomizing nozzle 40 xed to the forward end of an oil supply pipe 4I. Mounted on the front portion of pipe 4I is a member l2 of insulation having radial pins 43 to engage the peripheral wall of tube 3|. The rear end of pipe ill is centrally fixed to a two armed spider 34, which spans the rear end of the air tube and has each outer end received between a pair of ribs A (Fig. 3) formed on extension 28, whereby the spider is held from turning. The spider 44 has a central hollow tubular portion 46, which is closed at its rearward end and at its forward end receives the rear end of the oil pipe 4I. A ilexible copper tube lll, connected to the portion 136, extends out of the air tube through a recess 48 (Fig. 2) in rear wall 'l and connects with an oil pump which is mounted within the casing of motor 23. A union 49 is interposed in the tube 41,

Ignition electrodes are shown at 5K3, mounted in insulators 5 l, secured as indicated to the mem* ber 42. The rear ends of these electrodes engage spring-pressed buttons 52 mounted in insulators 53 on an ignition transformer 54, fixed to door 32. The buttons 52 are connected to the terminals of the secondary windingv of the transformer.

The housing sections l and 2 may provide also a junction box 55 (Fig. 3), formed by flanges, such as 55 on wall 7, and similar and abutting flanges on wall I3. This junction box may contain a control unit 5l. Access to the box is had by way of a suitable removable door plate 58 on rear wall 'l.

It will be noted that the housing sections l and E are so designed that they may be cast. All that is necessary is to drill and tap a few holes in these sections. The intermediate plate 3, and the sound deadener part Ll if used, are cut from sheet stock and provided with punched holes for the retaining screws i8. The construction is therefore easy to make and the parts easy to assemble. The invention thus offers an improved multi-section housing construction for an oil burner, providing the casing for the air-supply fan and the passages for conducting the air to and distributing the air in the air tube of the burner.

I claim:

A fan housing construction, made up of two castings, each having a flat wall with a marginal flange along its top and sides, means for securing said castings together with their marginal anges abutting to form an enclosure of which the flat walls form the front and back walls and the abutting pairs of marginal flanges the top and side walls of the housing, the front wall having upper and lower openings therethrough respectively forming an inlet and an outlet for the fan, an annular ilange integral with the front wall and extending toward the rear wall the same distance as the marginal ange on the front wall and surrounding said outlet opening, a second ange integral with the back wall and extending toward the front wall for the same distance as the mara, ginal ilange on the back wall, said second flange forming a scroll chamber for the fan and a plenum chamber below the scroll chamber together with a passage connecting said chambers, a thin sheet metal plate clamped between said castings and having one face abutting the second ilange and the other face abutting said annular iiange, said plate having upper and lower openings therethrough one for connecting saidinlet opening to the scroll chamber and the other for connecting said plenum chamber to the space within said annular ange and to said outlet opening, and a tubular air director located within the plenum 4chamber and said space and extend ing in coaxial relation with the outlet opening from the front wall to the back wall with its ends engaged one with the front wall and one with the back wall. f Y WARREN H. DE LANCEY.

REFERENCES errno The following references are of record in the le of this patent:

UNITED STATES PATENTS 

